Carbon sheet and carbon binder



Aug. 17, 1937. J, QUARTZ I 2,090,425

CARBON SHEET AND CARBON BINDER Filed Feb. 18, 1955 2 Sheets-Sheet 1 Aug. 17, 1937. J. QUARTZ CARBON SHEET AND CARBON BINDER Filed Feb. 18, 1935 2 Sheets-Sheet 2 Inven?or'. 3.

Patented Aug. 17, 1937 UNlTED STATES PATENT OFFICE 2 Claims.

This invention relates to carbon paper and carbon paper binders used for making duplicate copies of typewritten matter simultaneously with a production of the original or ribbon copy.

5 An object of the present invention is the provision of a sheet of carbon paper having a single long margin thereof that extends beyond the letter receiving sheet with which the carbon paper is associated and is free from a carbon de- 10 posit or coating and has on its back face indicia which advises the typist the position of the line of type characters being written with respect to the top and bottom edges of the sheet, thereby to assist the typist in laying out the typewritten l5 matter on the sheet, the indicia preferably comprising a series of horizontal lines disposed in a vertical column that is extended from the top to the bottom of the marginal portion of the sheet, the lines being spaced apart distances equal to the distance between consecutive type lines and numbered consecutively starting from the bottom of the sheet.

A further object of the invention is the provision of a carbon binder comprising a stack or series of superimposed carbon sheets bound or secured together at their similar edges and, sometimes, attached to a backing sheet and the other edges being free, the top carbon sheet having a margin arranged and disposed as above described and the under sheets having either a plain white margin or being terminated at the beginning of the margin of the uppermost sheet, as may be desirable.

It is desirable to apply a trade name or identi- 35 fying mark to each sheet of carbon paper to distinguish it from other makes. Hence a further object of the invention is the provision of a carbon sheet having a margin that is free from a carbon deposit and bears the identifying mark,

0 which can be so located with respect to the bottom of the paper as to indicate to the typist the approach of the end ofthe paper.

A yet further object is generally to improve the construction and to extend the use of carbon sheets.

Fig. 1 is a plan view of a carbon sheet embodying the present invention.

Fig. 2 is a plan view of a modified form ofcarbon sheet.

50 Fig. 3 is a plan view of a carbon binder embodying the present invention.

Fig. 4 is a plan view of the binder of Fig. 3, the corners of the carbon sheet being upturned to illustrate their relative disposition and con- 65 struction.

Fig. 5 is a view similar to Fg. 4 but illustrating a modified form of a carbon sheet pack.

The carbon paper sheet ll] of Fig. 1 has the usual front or working face covered with a carbon coating or deposit H, the back face being free from a carbon coating. The width and length of the carbon deposit is adapted to be about equal to the width and length of the paper.

sheets between which the carbon sheet is interposed for use. The carbon sheet is provided with a single laterally extended narrow margin M at the right hand edge thereof, which is coextensive with the top and bottom edges of the sheet and is extended beyond the paper sheets with which the carbon sheet is adapted to be associated when the left hand edges of the carbon and paper sheets are in line. The front face of the margin I4 is extended beyond and is free from the carbon deposit l2 so that the margin may be grasped by the fingers and the carbon sheet removed from its position between the paper sheets without soiling the fingers. Since the margin I 4 is free from carbon on its front or working face, the margin both on its working and back face is the color of the paper, which usually is white. The back face of the body of the sheet, over the carbon coating, is dark in color due to the coating. The back face of the margin is provided with a. trade name I6 or other mark that identifies the carbon sheet from sheets of other makes. The mark, being on the back of the sheet is in position to be prominently displayed to the typist. The mark preferably also is so located with respect to the edges of the sheet, and particularly the bottom edge, as the lowermost mark I 6, in Fig. 1, as to denote to the typist the approximate position of the line of type being written with respect to the top and bottom edges of the sheet. The indicia l6 preferably appears in the upper and lower portions of the margin H, as, for instance, in the middle of the end thirds of the margin, where knowledge of the location of the end of the sheet is quite important. Similar indicia may also appear on the middle of the sheet. The margin preferably has a scale l8 including a vertical series of short horizontal lines or marks 20 that extend from the bottom to the top of the sheet and are successively numbered, beginning at the bottom, as illustrated, but for some purposes beginning at the top, the spacing between the lines conforming to the spacing between the lines written by the typewriter so that accurate knowledge of the position of any line with respect to the top or bottom edge of the sheet is instantly available. The margin may also have a suitable indication as the arrow 22 positioned to indicate the middle of the sheet. For some purposes the carbon sheet can have all of the indlcia herein described, as illustrated in Figs. 1, 3 and 4. For other purposes it is sufficient to employ the scale It alone or the indicia l8 alone and in Fig. 2 the carbon sheet Illa has a margin a that is similar to the margin H and is provided only with the indicia Illa located in about the middle of the upper and lower thirds of the sheet.

While the carbon sheet as above described has the margin'only on the right hand side, for some purposes the margin can be on the left hand side of the sheet in an obvious manner.

With the constructions above described the typist has at all times knowledge of the distance from the end the sheet to the line she is typing and thus can arrange the typedmatter to best advantage on the sheet. She also can arrange the various parts of the typed matter on the sheet with neatness and accuracy. The scale it provides the typist with a line scale that cooperates with the letter scale usually found on all typewriters above and parallel with the platen in providing the typist with accurate knowledge at all times of the position of any typed character on the sheet. The scale also serves to lengthen the period of usefulness of the carbon sheet as the typist can at times start the typed lines in line with the line marks on the scale and at other times between the line marks onthe scale so as to use more of the available surface of the carbon coating than has ordinarily been the custom.

The invention is shown applied to a carbon binder in Figs. 3, 4, and 5. The carbon binder in Figs. 3 and 4 consists of a top carbon sheet lilb and a number of lower carbon sheets 24 disposed in superimposed order upon a backing sheet 26 and having their similar edges, and herein their top edges disposed under a fold 28 of the top edge of the backing sheet and secured together and to the fold and to the backing sheet by a line of stitching 30. The lower carbon sheets 24 have their working faces coated thoughout their width with a carbon deposit. The top sheet lllb has a carbon deposit l2b about equal in r approximately the width of the top carbon sheet so that the extended margin Mb overlies a marginal portion of the backing sheet that is extended beyond the narrower carbon sheets 24. The margin Mb is provided with indicia I617, the arrow 22b and the scale I 8b corresponding to the parts I6, 22 and [8 respectively, of the sheet of Fig. 1, although'if desired only one type of indicia need appear on the margin as, for instance, the scale lib. The binder thus described 'is adapted ior use in more or less the usual way, paper sheets being interleaved with the carbon sheets and a paper sheet being disposed on top oi the top sheet lb. The margin Nb of the uppermost carbon sheet extends beyond the paper sheets and thereby provides visible means by which the operative can determine at any instant the precise position ofthe line beingtyped with respect to the topand bottom edges of the sheets.

In Fig. '5 the carbon sheets are arranged in a pack, without a backing sheet. The top sheet consists of a sheet such as the sheet In of Fig. 1 having the margin It and the scale II." The under sheets are the sheets Illa of Fig. 2, having the margins Ila and trade marks "a but not having scales, which are unnecessary since the scale on the top sheet is sufllcient. In some car- .bon packs the top sheet may be thicker than the undercarbon sheets and may or may not have a carbon deposit on the front face thereof but, in accordance with this invention, has the margin l4 and scale It.

I claim:

1. A carbon sheet comprising a paper sheet having a carbon deposit on its working face and a projecting uncoated margin on one long edge of the sheet contrasting in color with the remainder of the sheet and coextensive with the top and bottom edges of the sheet, said uncoated margin having on its back face a continuous series of horizontal marks spaced apart by a distance equal to the single line spacing of a typewriter, the continuous series of single spaced line marks being coextensive with the length of the margin having on its back face a continuous series of marks spaced apart by a distance equal to the single line spacing of a typewriter, the series of marks being coextensive with the length of the carbon deposit and said marks being progressively numbered throughout the length of the margin, said marks and said numbers serving to denote the position of typed characters on all portions of the sheet and to cooperate with the scale of the platen.

JAMES QUARTZ. 

